Research on Adaptive Time-Frequency Real-Time Synthesis System Without Master-Clock
The maritime satellite navigation system is of great significance for ensuring maritime safety,improving navi-gation efficiency,promoting marine economic development,enhancing the status of national marine strategy.The demand for high-precision time-frequency signals in maritime satellite navigation is very high.A time-frequency synthesis system for independent timekeeping based on hydrogen and cesium clocks is developed.The verification of atomic time algo-rithm is conducted by building an experimental system.The system consists of a local integrated device and a Phase Micro-stepper.By changing the traditional hardware structure and using a highly stable crystal oscillator inside the Phase Micro-stepper as a reference source,the reliability has been improved;the system observes in real-time and dynamically assigns weights,which achieving automated operation without human intervention.By adopting the adaptive weighted av-erage algorithm,the comprehensive atomic time takes into account the frequency stability and accuracy of the clock group signal,thereby obtaining a stable and reliable high-precision time reference.The experimental results show that the second frequency stability of the system output signal reaches 4.41×10-13,and the day frequency stability is 4.33×10-16.The feasibility and reliability of the adaptive time-frequency synthesis system have been effectively verified.
system punctualitysynthetical atomic timeadaptive weighted average algorithmfrequency stabilitymaster-clock free
国家科技期刊平台
NSTL
万方数据
